To provide a molten metal supplying method by delicately performing supply of the molten metal as a material for casting into a pouring pot attached to a die for casting by tilting the pouring pot at almost 90°.

The height of the surface of the molten metal 90 supplied into the pouring pot 18 is measured at each prescribed time so as to bring the surface of the molten metal 90 into momentary contact with a detecting bar 11 beforehand raised and the supplying speed of the molten metal 90 from the displacing amount of the height before and after measuring and the prescribed time, is calculated, and the operating speed of the molten metal supplying apparatus 20 for supplying the molten metal 90 into the pouring pot 18 is controlled according to the supplying speed.